Abstract: The present invention describes a method and apparatus for vaporizing and thermally incinerating leachate utilizing gas, including waste gas. The method of disposing of the leachate and waste gas comprises the steps of combusting waste gas in a fire tube heater submerged in leachate contained in a pressure-controlled tank, vaporizing the leachate with thermal energy absorbed from the fire tube heater, releasing the resulting leachate vapor through a pressure valve to a connecting enclosed thermal incinerator, and combusting the leachate vapor in the thermal incinerator thereby destroying volatile organics in the vapor.